CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 6,069	$ 5,836
Marketable securities	7,593	8,295
Accounts receivable, less allowances of $299 at March 31, 2020 and $322 at December 31, 2019	14,327	16,059
Inventories	17,050	15,580
Prepaid expenses	569	559
Other current assets	1,060	1,020
Total current assets	46,668	47,349
Marketable securities, long-term	15,187	12,168
Equipment and leasehold improvements, net	3,063	3,341
Intangible assets, net	280	310
Goodwill	1,366	1,366
Right-of-use assets (operating leases)	2,850	2,111
Trade notes receivable, long-term	876	962
Deferred tax assets	4,892	4,992
Total assets	75,182	72,599
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	8,192	7,023
Advance customer payments	548	499
Accrued expenses	2,559	2,572
Current operating lease liabilities	736	688
Total current liabilities	12,035	10,782
Other liabilities	204	202
Long-term operating lease liabilities	3,758	3,141
Reserve for income taxes	150	150
Total liabilities	16,147	14,275
Commitments and contingencies
Stockholders’ equity:
Preferred stock, no par value, 5,000,000 shares authorized, none outstanding	0	0
Common stock, no par value, 25,000,000 shares authorized, 7,164,654 shares issued and outstanding at March 31, 2020 and 7,154,591 shares issued and outstanding at December 31, 2019	37,016	36,659
Accumulated other comprehensive loss	(1,896)	(1,406)
Retained earnings	23,915	23,071
Total stockholders’ equity	59,035	58,324
Total liabilities and stockholders’ equity	$ 75,182	$ 72,599